export default {
  vcity: {
    11: '北京',
    12: '天津',
    13: '河北',
    14: '山西',
    15: '内蒙古',
    21: '辽宁',
    22: '吉林',
    23: '黑龙江',
    31: '上海',
    32: '江苏',
    33: '浙江',
    34: '安徽',
    35: '福建',
    36: '江西',
    37: '山东',
    41: '河南',
    42: '湖北',
    43: '湖南',
    44: '广东',
    45: '广西',
    46: '海南',
    50: '重庆',
    51: '四川',
    52: '贵州',
    53: '云南',
    54: '西藏',
    61: '陕西',
    62: '甘肃',
    63: '青海',
    64: '宁夏',
    65: '新疆',
    71: '台湾',
    81: '香港',
    82: '澳门',
    91: '国外'
  },
  checkIdcard(idcard) {
    // 是否为空
    if (idcard == null || idcard === '') {
      return '请输入身份证号码'
    }
    // 校验长度，类型
    if (this.isCardNo(idcard) === false) {
      return '请输入有效的身份证号'
    }
    // 检查省份
    if (this.checkProvince(idcard) === false) {
      return '请输入有效的身份证号'
    }
    // 校验生日
    if (this.checkBirthday(idcard) === false) {
      return '请输入正确的身份证号'
    }
    // 检验位的检测
    if (this.checkParity(idcard) === false) {
      return '请输入有效的身份证号'
    }

    return true
  },
  isCardNo(idcard) {
    // 身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X
    let reg = /(^\d{15}$)|(^\d{17}(\d|X)$)/

    if (reg.test(idcard) === false) {
      return false
    }

    return true
  },
  checkProvince(idcard) {
    let province = idcard.substr(0, 2)

    if (this.vcity[province] === undefined) {
      return false
    }

    return true
  },
  checkBirthday(idcard) {
    let len = idcard.length

    // 身份证15位时，次序为省（3位）市（3位）年（2位）月（2位）日（2位）校验位（3位），皆为数字
    if (len === 15) {
      let reFifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/
      let arrData = idcard.match(reFifteen)
      let year = arrData[2]
      let month = arrData[3]
      let day = arrData[4]
      let birthday = new Date('19' + year + '/' + month + '/' + day)
      return this.verifyBirthday('19' + year, month, day, birthday)
    }

    // 身份证18位时，次序为省（3位）市（3位）年（4位）月（2位）日（2位）校验位（4位），校验位末尾可能为X
    if (len === 18) {
      let Wi = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]
      let ArrCheckSum = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2']

      let Re18Digital = /(\d{1})(\d{1})(\d{1})(\d{1})(\d{1})(\d{1})(\d{1})(\d{1})(\d{1})(\d{1})(\d{1})(\d{1})(\d{1})(\d{1})(\d{1})(\d{1})(\d{1})([0-9xX]{1})/
      let Arr = Re18Digital.exec(idcard)
      if (Arr == null) {
        return false
      }
      let Sum = 0
      for (let i = 0; i <= 16; i++) {
        Sum += Arr[i + 1] * Wi[i]
      }

      let strCheckSum = ArrCheckSum[Sum % 11]
      if (!(strCheckSum === Arr[18].toLocaleUpperCase())) {
        return false
      }

      let reEighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X|x)$/
      let arrData = idcard.match(reEighteen)
      let year = arrData[2]
      let month = arrData[3]
      let day = arrData[4]
      let birthday = new Date(year + '/' + month + '/' + day)

      return this.verifyBirthday(year, month, day, birthday)
    }

    return false
  },
  verifyBirthday(year, month, day, birthday) {
    let now = new Date()
    let nowYear = now.getFullYear()

    // 年月日是否合理
    if (parseInt((birthday.getFullYear() + birthday.getMonth() + 1 + birthday.getDate())) === (parseInt(year) + parseInt(month) + parseInt(day))) {
      let time = nowYear - year
      if (time >= 18) {
        return true
      }
      return false
    }

    return false
  },
  checkParity(idcard) {
    // 15位转18位
    idcard = this.changeFivteenToEighteen(idcard)
    let len = idcard.length

    if (len === 18) {
      let arrInt = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]
      let arrCh = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2']
      let cardTemp = 0
      let i
      let valnum
      for (i = 0; i < 17; i++) {
        cardTemp += idcard.substr(i, 1) * arrInt[i]
      }
      valnum = arrCh[cardTemp % 11]
      if (valnum === idcard.substr(17, 1)) {
        return true
      }
      return false
    }

    return false
  },
  changeFivteenToEighteen(idcard) {
    if (idcard.length === 15) {
      let arrInt = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]
      let arrCh = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2']
      let cardTemp = 0
      let i
      idcard = idcard.substr(0, 6) + '19' + idcard.substr(6, idcard.length - 6)
      for (i = 0; i < 17; i++) {
        cardTemp += idcard.substr(i, 1) * arrInt[i]
      }
      idcard += arrCh[cardTemp % 11]
      return idcard
    }

    return idcard
  }
}
